import React from 'react';
import ReactEcharts from 'echarts-for-react';
import echarts from 'echarts';

const Radar = () =>{

    const option = {
        title: {
            text: '浏览器占比变化',
            subtext: '纯属虚构',
            x:'right',
            y:'bottom'
        },
        tooltip: {
            trigger: 'item',
            backgroundColor : 'rgba(0,0,250,0.2)'
        },
        legend: {
            data: (function (){
                var list = [];
                for (var i = 1; i <=28; i++) {
                    list.push(i + 2000 + '');
                }
                return list;
            })()
        },
        visualMap: {
            color: ['red', 'yellow']
        },
        radar: {
           indicator : [
               { text: 'IE8-', max: 400},
               { text: 'IE9+', max: 400},
               { text: 'Safari', max: 400},
               { text: 'Firefox', max: 400},
               { text: 'Chrome', max: 400}
            ]
        },
        series : (function (){
            const series = [];
            for (let i = 1; i <= 28; i++) {
                series.push({
                    name:'浏览器（数据纯属虚构）',
                    type: 'radar',
                    symbol: 'none',
                    itemStyle: {
                        normal: {
                            lineStyle: {
                              width:1
                            }
                        },
                        emphasis : {
                            areaStyle: {color:'rgba(0,250,0,0.3)'}
                        }
                    },
                    data:[
                      {
                        value:[
                            (40 - i) * 10,
                            (38 - i) * 4 + 60,
                            i * 5 + 10,
                            i * 9,
                            i * i /2
                        ],
                        name: i + 2000 + ''
                      }
                    ]
                });
            }
            return series;
        })()
    };
    return (
      <div>
        <ReactEcharts
          option={option}
          style={{height: '50vh', width: '100%'}}
         />
      </div>
    );
}
export default Radar;
